diff --git a/shiny/selectionP/app.R b/shiny/selectionP/app.R
new file mode 100644
index 0000000..7b77da6
--- /dev/null
+++ b/shiny/selectionP/app.R
@@ -0,0 +1,71 @@
+library(shiny)
+library(upsetjs)
+library(purrr)
+library(dplyr)
+
+set_list_2_combinations <- function(set_list) {
+  set_list <- set_list[
+    order(purrr::map_int(set_list, length), decreasing = TRUE)
+    ]
+  set_names <- names(set_list)
+  purrr::map(seq_along(set_names), ~{
+    lst <- combn(set_names, .x) %>% as.data.frame() %>% as.list()
+    names(lst) <- purrr::map_chr(lst, ~paste0(.x, collapse = "&"))
+    lst
+  }) %>% unlist(recursive = FALSE)
+}
+
+set_list <- list("A" = c(1,2,3,4,5),"B" = c(1,2,3),"C" = c(2,6,7,8))
+combinations <- c(list("none" = ""), set_list_2_combinations(set_list))
+
+# reactive values ----
+# I next tried a compromise still re-rendering the plot in place of proxy
+# but with a reactive value that would respond to clicks in place of a direct
+# input - this also did not work
+ui <- fluidPage(
+  shiny::sidebarLayout(
+    shiny::sidebarPanel(
+      actionButton("reset_selection", "Reset Selection"),
+      verbatimTextOutput("selection")
+    ),
+    shiny::mainPanel(
+      upsetjs::upsetjsOutput("upset_plot")
+    )
+  )
+)
+
+server <- function(input, output, session) {
+
+  output$upset_plot <- upsetjs::renderUpsetjs({
+    upsetjs::upsetjs() %>%
+      upsetjs::fromList(set_list) %>%
+      upsetjs::interactiveChart('click', events_nonce = TRUE)
+  })
+
+  upset_selection <- reactiveValues(selected_sets = '')
+
+  observeEvent(upset_selection$selected_sets, {
+    upsetjs::upsetjsProxy('upset_plot', session) %>%
+      upsetjs::setSelection(upset_selection$selected_sets)
+  })
+
+
+  observeEvent(input$upset_plot_click, {
+    if(isTRUE(input$upset_plot_click[['isSelected']])) {
+      upset_selection$selected_sets <- ''
+    } else {
+      upset_selection$selected_sets <- input$upset_plot_click
+    }
+  })
+
+  observeEvent(input$reset_selection, {
+    upset_selection$selected_sets <- ''
+  })
+
+  # debug info
+  output$selection <- renderText({
+    jsonlite::toJSON(upset_selection$selected_sets)
+  })
+}
+
+shinyApp(ui, server)